Mechanism for manufacture of auger bits



Apr. 3, 1923. 1,450,252 B. -H. DAULTON ET AL MEGHANISM'FOR MANUFACTURE OF AUGER BITS Filed Feb. '7, 1921 2 sheets-sheet 1 INVENTOR BENJAMIN H. DA (/L TON, I

CHARLES E. Ros/118011,

ATTORNEYS Patented Apr. 3, 1923.

lanai I A CORPORATION OF OHJ IO.

MECHANISM FOR MANUFACTURE OF AUGER BITS.

Application filed February 7, 1921.

To all whom it may concern:

Be it known that we, BENJAMIN-H.-DAUL- TON and CHARLES B. ROBINSON, citizens of the United States, residing at WVilmington, in the county of Clinton and State of Ohio, have invented certain new and useful Improvements in Mechanism for Manufacture of Auger Bits, of which the following is a specification, reference being had therein to the accompanying drawing. This invention relates to an mechanism for the manufacture bits, .and. consists, essentially, of a pair of die members constructed with certain novel features pertaining to the die cavities by which the resulting bit or product derived improved of auger from these die members will have forwardprojecting cutting spurs, as distinguished from a bit inwhich these spurs are absent, asfor instance, the bit shown in the 00 pending application of one'of us, namely, Benjamin H. Daulton, filed F eby. 7th, 1921, Ser. No. 442,898, new Patent No. 1,420,527, dated June-20th, 1922.

The die cavities in our present invention further differ from the dies in the application just referred to in the provision of a different and more pronounced die recess for the formation of a so called pyramid to formthe-short side of the auger, as will hereinafter be more fully explained in detail.

' In the accompanying drawings,

F ig.-.1- is. a plan view of one die member containing the first and second die cavities, the first cavity being used in the first die treatment of the raw stock and the second die cavity in the second treatment of the stock' Fig. 2 is a like view of the other die member with the corresponding die cavities;

, Fig. 3 is a view of a portion of the raw stock in the form to which it is reduced when made ready for treatment by our dies; Fig. 4 is a view of the stock after the first die treatment showing the side treated by the lower die;

Fig. 5 isalso a view of the stock after the first-die treatment showing the side treated by the upper die;

ig. 6 is a view of the stock after the second die treatment showing the side treated by the lower die;

forforming one of the Serial No. 442,s99.-

second treated by th Fig. 8 is a Figs. 6 and 7 sheared oil; a.

e upper die;

view of the product-shownin Fig. 9 isa sectional viewotone of-the die members on the line 9-9 of Fig. :1; Fig. 10 is a sectional asectional view onthe line die member shown in F 1g. 1

the die member shown in Fig.-1;

In the drawings numeral l- 'designates' what for convenience we will call the first or lower die member and the numeral 2"the Fig. 7 is a like viewof the stock after-the die treatment showing side after the surplus web has beenview of (the, otherdie member on the line 10-10 of Fig. 2;

a sectional view on the line the line second or upper die member. The die-cav-ithose generally shown at 4 'andthe die c avities generally indicated by 5 cooperate-with those so indicated by6. i

Specifically, the die cavitie's' '3 comprise recesses 3 for the core 3* for the spiral; studs 3 in sustaining theblank in place;-a recess'3 points; a recess 3 for forming one pa'rt of the short side,

and a large flat recess for receiving some of the surplus-material contained in the bar 7 of the blank stock shown in Fig. 3, the balance of thelsurplus overfiowingthe recess 3 .onto the faceof the die and leaving a fin or web. 8 inaddition to the plate-like part. 9 formed in the recess 3 and shown inFig. 4. 3 We'would lay particular emphasis upon the recess 3 in which a I formed, as shown at 10in Fig. 4, this pro; jection 10 being the product of such 'recess 3 Then the recess 3 forms the pyramid spurs or cutting ties generally shown at 3 cooperate with a I of the bit; recesses which cooperate 7 portion of the cutting spurqis.

11 shown in Fig. 4, which pyramid ulti-.

mately becomes a part of the short side, as seen in Figs; 5 and 6. M

It will now be understood that when the raw stock shown in Fig. 3 is placed in the recesses generally shown at 3 in Fig. 1 and the die 2 is brought down upon the stock so that by a blow or pressure it will enter in the recesses generally shown at 4, the stock will be converted from what is shown in Fig. 3 to what is shown in Figs. i and 5, the recesses generally shown at 3 forming what appears in Fig.4 and recesses generally shown at 4 forming what is shown in F ig. 5, the spur l and the pyramid 11 being with the surplus material 9 the essential product of the recesses in the group 3 and the portion 10 and the pyramid ll being formed by the recesses at and i respectively, presently to be described.

I for forming the portion 10,

Referring'now to the die recesses shown generally at 4: in Fig. 2, it will be seen that at P there is a recess for the core of the bit; at 4-? recesses for the spirals; at a a recess as before stated, which portion ultimately enters into a part of the short side and at 4& a recess which forms the pyramid 11, as before stated, and, which pyramid ultimately forms the termination. of the spiral.

1 after which the fin 12 described), which project forwardly of the.

. ished by resort So much for the treatment of: the raw stock in the first operation, in which the dieirecesses 3 and e are used.

Turning now to the die recesses generally shown at 5 and 6, it is to be understood that the stock in the condition shown in Figs. a and 5 isconverted by the cooperation of theserecesses 5 and 6, in the second die operation, into the state shown in Fig. 6, is sheared off to leave Fig. 8, which is finto a milling operation.

The peculiarities of the recesses 5 are these. Cavities 5 for the core of the bit, 5* for the spiral with a stud 5 to coact in more readily holding the bitv in place, as does the stud 3; and in. recesses 5 and prongs 5 for forming the cutting: spurs T (in cooperation with the recesses and spurs 6 and 6 presently to be the product shown in cuttingedges7 (see Figs. 6, 7 and 8) while intermediate of the prongs 5 is a recess 5 which forms one-half of the auger point which is ultimately screw-threaded to make it: take, into the wood when boring.

Then the coacting recesses generally designated 6' comprise specifically the parts 6 for the core; 6" for the spirals; recesses 6 and prongs 6 for forming the cutting spurs; a recess 6" for auger point and a recess 6 for finishing off the portion 10 (see Fig. 5), to constitute one part. 10 of the short side (see Fig. 7) the other part of the short side coming from. the recess 5 and being. shown at 13 in Fig. 62' and finally, a: recess 6 which produces the extreme termination 14: of the spiral, the remainder of the termination of the spiral coming out of. the recess 5 appearing in Fig. 1.

To provide; means for the escape of the forming a part of the form of shallow grooves 18. These features 1 are associated with the die recesses generally designated at 6.

The die recesses generally designated i have somewhat similar features for receiving the surplus material, namely, a sloping surface 19 with concave depressions 20 at either side extending inwardly, as shown at 21, and bordered with slightly inclined surfaces 22-23.

Thus it will be seen that by our dies we produce the short side of the bit, the termination of the spiral side, the cutting edges and the cutting spurs, as well as the extreme point; and that we do this'froma bar of raw stock, eliminating by our dies and the shearing operations used in. connection therewith the old objectionable upsetting or longitudinal compression of the material.

Our dies have been used in commercial practice and found to be effective and satisfactory.

Having thus fully describedour invention, what we claim as new and desire to secure by Letters Patent, is

1. In a die for the production of anger bits, the combination, with one die member having core and spiral recesses, a spur recess at one side of the center and apyramid recess at the other side, and a recess for surplus material, of a second die member having core and spiral recesses and spur and pyramid recesses, and a surplus material recess, the'said recesses adapted to coact withthe similar recesses in the other die member.

2. In a die for the production of auger bits, the combination, of one. die member having core and spiral recesses, a spur recess at one side of the center and a com bined pyramid and spur recesses at theo her side, and apoint recess, with another die member having core and spiral recesses, a spur recess at one side of the center and a combined pyramid and spurrecess' at the other, and a point recess, adapted to coact with the corresponding recesses in the other die member.

s 3. In a die for the production of auger bits. the combination, of one die member having two sets of recesses, each set com= prising core and spiral recesses, and one-set spur, pyramid and surplus material recesses and the ether set a spur recess, a combined: pyramid and spur recess, and a point recess. with another die member having two sets of die recesses each having acore-recess and a spiral recess, and one set having a spu recess and a pyramid recess, and-the other set having a spur recess, a. combined: pyramid and spur recess, and a point recess,

one set of recesses v on each die member adapted to coact with the corresponding recesses on the other die member."

4:. In a die for the production of auger bits, a die block having forming recesses comprising a core recess, spiral recesses, a spur recess at the end of one spiral recess, a pyramid recess at the end of the other spiral recess and a surplus material recess to receive the overflow metal adjacent to these latter recesses.

5. In a die for the production of auger bits, a die member having forming recesses comprising a core recess, spiral recesses, a spur recess at the end of one spiral recess, a combined pyramid and spur recess at the end of the other spiral recess, and a point recess intermediate the spur recesses.

6. In a die for the production of auger bits, a die member having forming recesses comprising a core recess, spiral recesses, a

combined spur and short side recess, an opposite combined spur and pyramid recess, andan intermdiate point recess.

7. In a die for the production of auger bits, a die member having forming recesses comprising a core and spiral recesses, a short side pyramid recess at one side of the core end and an opposite pyramid recess at the other side of said core end, and an adjacent recess for the surplus material.

In testimony whereof, We afiix our signa-v tures.

BENJAMIN H. DAULTON. CHARLES B. ROBINSON. 

